Alabi et al. World Journal of Engineering Research and Technology www.wjert.org 325 DEVELOPMENT OF AN INDIGENOUSLY MADE DIESEL INJECTOR TESTER * 1 Alabi Ismaila Olanrewaju, 2 Okediji Adebunmi Peter, 3 Owoo Ezedeen Ademola and 4 Gerald Chimaobi Nwachukwu 1,4 Department of Automotive Engineering, Elizade University Ilara-Mokin, Ondo State, Nigeria. 2 Department of Mechanical Engineering, Elizade University Ilara-Mokin, Ondo State, Nigeria. 3 Department of Agricultural Engineering, Ladoke Akintola University of Technology Ogbomoso, Oyo State, Nigeria. Article Received on 12/08/2019 Article Revised on 01/09/2019 Article Accepted on 20/09/2019 ABSTRACT This work entails the design and construction of a diesel injector tester for proper spray pattern, leakages and pressure inspection. The mechanism is important as the injection system requires greater manufacturing precision and tight tolerance for the system to function efficiently. A diesel injector tester was designed with CREO Parametric CAD software after which the real hardware prototype was developed. The machine was tested and its performance was evaluated through the spray, pressure and leakage tests, respectively, as it worked perfectly. Conclusively, the machine was successfully completed having a unique ability of being modified as it can be utilized in any automobile workshop for proper diagnosis. Necessary recommendations were later made. KEYWORDS: Diesel engine, Injection system, Injector tester, CREO parametric, Evaluation. 1. INTRODUCTION The automotive industry is constantly challenged to overcome the demands of lower engine emission level, more efficient fuel economy, and quicker vehicle response time with wjert, 2019, Vol. 5, Issue 5, 325-337. World Journal of Engineering Research and Technology WJERT www.wjert.org ISSN 2454-695X Review Article SJIF Impact Factor: 5.924 *Corresponding Author Alabi Ismaila Olanrewaju Department of Automotive Engineering, Elizade University Ilara-Mokin, Ondo State, Nigeria.